1. M. A. Linnell () and C. W. Epps, Dept of Fisheries and Wildlife, Oregon State Univ., 104 Nash Hall, Corvallis, OR 97331, USA.
2. E. D. Forsman, United States Forest Service, Pacific Northwest Research Station, Corvallis, OR, USA.
3. W.J. Zielinski, United States Forest Service, Pacific Southwest Research Station, Arcata, CA, USA